horrible feature where it dims your mic to other players depending on how far away you are. oh god its terrible.
I don't know about them. Meaning I'm not sure.Yup :/.
They aren't really realistic. I mean, look at the Character model; they all have Mics and Earplugs themselves, why shouldn't they hear what their allies say? They have that for a reason :/
It also makes the game incredibly easy for target RDMing and easy for Traitors in general.